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<title>认识css属性</title>
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<li><a href="index.html" target="_blank">主页面</a></li>
<li><a href="css01.html" target="_blank">css作业01：认识css</a></li>
<li><a href="css02.html" target="_blank">css作业02： </a></li>
<li><a href="css.04.html" target="_blank">css作业04：css布局</a></li>
<div class="box1">宽、高、边框、背景色</div>
<div class="box2">边界</div>
<div class="box3">水平居中</div>
<div class="box4">填充padding</div>
<div class="box5">盒子模型:元素的真实宽度：宽度+边界+填充+边框</div>
<div class="box6">css文本设置</div>
<div class="box7">777777</div>
<div class="box8">888888</div>
<div class="box9">999999</div>
<div class="box10">101010</div>
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